Christopherson, Robert W <br/><br/>
Geosystems:  an introduction to physical geography/ 
Robert w Christopher/ 
 - 4th ed. 
 - New Jersey:  Prentice hall,  2000. 
 - xix, 626 p. : 
<br/><br/> Includes bibliographical references 
<br/><br/><label>ISBN: </label>0130108456 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Physical geography
<br/><br/><label>LC Class. No.: </label>GB 54.5 .C48 2000